JPH02301105A - Transformer for generating high voltage - Google Patents

Abstract

PURPOSE:To obtain insulation between a high voltage bobbin and a primary winding by winding an insulation film having a window to expose part of a conductive foil on a low voltage bobbin, winding a low voltage winding thereon, and connecting the end to the foil exposed via a window. CONSTITUTION:An insulating film 33 is wound on a low voltage bobbin 30. In this case, a predetermined stripelike conductive foil 31 is so wound as to be exposed from a predetermined window 34 without positional deviation. A tertiary winding for generating various voltages to be supplied to sections of an apparatus is wound on the first layer of the low voltage winding. The end of a wire 36 is connected to one or the foil 31, i.e., a stripelike conductive foil 31a, wound in predetermined number of turns, and the wire 36 is connected to a stripelike conductive foil 31b in a window B by fusion-welding. Then, an operation of forming an adjacent winding is conducted, and the winding end of the wire 36 is connected to other stripelike conductive foil at the uppermost part by fusion-adhering, etc. Then, an insulation film is again wound thereon, and a primary winding 39 is wound thereon.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a transformer device for generating high voltage to be applied to the anode of a cathode ray tube.

2. Description of the Related Art First, a flyback transformer will be described as an example of a conventional high voltage generating transformer device. FIG. 14 is a diagram showing the circuit configuration of a hot type flyback transformer. In FIG. 14, 1 is a magnetic core, 2 is a low voltage winding, and 3 is a high voltage winding. In the low voltage winding 2, 4 is a primary winding through which a sawtooth current supplied from the horizontal deflection circuit flows.

By the way, the flyback transformer is designed not only to generate high voltage for the cathode ray tube, but also to generate various voltages to be supplied to various parts of the device (in this case, the television receiver). ing. In the low voltage winding 2, 5 is a winding for generating various voltages to be supplied to various parts of the device, and these windings will be referred to as the tertiary winding 5 hereinafter.

On the other hand, the high-voltage winding 3 is wound around a high-voltage bobbin in a plurality of layered layers. That is, 3a is a first layer winding among the high voltage windings, and 3b is a second layer winding among the high voltage windings. Similarly, 3c, 3d, 3e, 3
f is the winding of the third layer, the fourth layer, the fifth layer, and the sixth layer, respectively. Reference numeral 6 denotes a rectifying diode connected between each layer of the high voltage winding 3. The diodes 6 are connected in series between each layer of the high-voltage winding in the same direction, that is, in the direction in which the current IK flows. 8 is a resistor for absorbing linking noise, and 9 is a protective resistor on the anode side.

The winding start end of the first layer winding 3a is connected to A through a resistor 8.
Connected to the BL circuit.

Moreover, 10 is what is called a focus unit constituted by a plurality of voltage dividing resistors.

FIG. 15 shows the structure of this flyback transformer. In FIG. 15, 12 is a bobbin for low-voltage winding, and by forming a plurality of flanges 20, a plurality of slots can be provided, and the primary winding 4 is placed in some slots, and the primary winding 4 is placed in other slots. A tertiary winding 5 is wound respectively.

Further, a plurality of terminal bin holding members 13 are protruded from the lower end portion of the bobbin 12, and a terminal bin 14 is provided in each terminal bin holding member 13.

15 is a bobbin for high-voltage winding, and 16 is an insulating layer provided between each layer of the high-voltage winding 3 wound on the bobbin 15. The insulating layer 6 is constructed by overlapping dielectric films. Note that, in reality, an opening-shaped magnetic core is installed so as to pass through the bobbin 12 for low-voltage winding, but this is omitted here.

The bobbin 15 is attached to cover the bobbin 12.

However, the terminal bin holder 13 and the terminal bin 14 are attached to the bobbin 1.
It protrudes from 5.

FIG. 16 is a perspective view showing the bobbin 12 for low voltage winding. In FIG. 16, 21, 22, and 23 are the ends of the low-voltage windings, or lead wires, respectively. For example, 21 is a lead wire of a winding wire wound in the uppermost slot. The tip of the lead wire 21 is connected to the terminal pin 14 at the bottom, but the part in the middle is in a state where the rack is passed over other windings, and the lead wire 21 and other windings are connected by the collar 20. The distance between the lines is maintained. Further, the other lead wires, that is, the lead wires 22 and 23, are similarly placed over the other windings, and the distance between them is maintained by the collar 20.

Problems to be Solved by the Invention Incidentally, the potential of the secondary winding with respect to the ground is very high, and a very high voltage is applied to the high-voltage winding bobbin. Therefore, it is undesirable for the high-voltage winding bobbin and the primary winding to not only come into contact with each other, but also to come close to each other.

However, in the conventional example described above, when an attempt is made to lower the collar 20 of the low-voltage winding bobbin 12 in order to separate the lead wire of the low-voltage winding from the bobbin 15 for the high-voltage winding, the lead wire of the low-voltage winding The spatial distance between the winding and other windings in the low-voltage winding becomes short, and the insulation of that part deteriorates. Furthermore, although winding is automatically performed by a machine, it is not always wound in an orderly manner (for example, variations in the shape of the bundle of low-voltage windings in the wound state cannot be ignored; therefore, in the end, it is necessary to It is necessary to design with a large spatial distance between the bobbin and the bobbin.Also, this becomes a major obstacle when trying to design a small product.

The present invention has been made in view of this problem, and an object of the present invention is to provide a high voltage generating transformer device that ensures insulation between the high voltage bobbin and the primary winding even if it is miniaturized. do.

Means for Solving the Problems In order to solve the above problems, the present invention installs a plurality of conductors whose ends are connected to terminal bins on the low voltage bobbin in the longitudinal direction of the low voltage bobbin. An insulating film with a window is wound around the low-voltage bobbin so that a portion thereof is exposed, and a low-voltage winding is wound on the insulating film, and the end thereof is connected to the conductive foil exposed by the window. did.

Operation Due to the above configuration, the conductive foil installed in advance establishes continuity between the ends of each winding in the low voltage winding and the terminal bin, and the windings far from the terminal bin are connected to each other. This eliminates the need to pull the end of the wire all the way to the terminal pin.

EXAMPLE Hereinafter, an example of a transformer device for high voltage generation according to an example of the present invention will be described. FIG. 1 is a perspective view showing a low-pressure bobbin 30 of the present high-pressure generating transformer device. In FIG. 1, 31 is a strip-shaped conductive foil provided on the low-voltage bobbin 30, and the strip-shaped conductive foil 31 is removed by etching an unnecessary portion of the yi4 foil uniformly adhered to the side surface of the low-voltage bobbin 30. It is formed by the means.

A plurality of strip-shaped conductive foils 31 are attached along the longitudinal direction of the low-pressure bobbin 30 at approximately equal intervals. The lower end portions are connected to terminal pins 32, respectively.

FIG. 2 is an enlarged perspective view showing the terminal bin holder formed on the bobbin 30, and as shown in FIG. 2, the rear end of the terminal bin 32 protrudes outward from the rear end surface of the terminal bin holder. ing. Further, the strip-shaped conductive foil 31 is arranged on the rear end surface of the terminal bin holder, and the strip-shaped conductive foil 31 is connected to the rear end of the terminal bin 32 by welding.

In FIG. 3, 33 is an insulating film wound around the low-pressure bobbin 30. The insulating film 33 includes a strip of conductive foil 3.
A window 34 is formed so that a portion of 1 is exposed.

Further, FIG. 8 shows the low voltage bobbin 30 in a state in which only the tertiary winding among the low voltage windings has been completed. In FIG. 8, each low voltage winding is wound on the insulating film 33. For example, both ends of the lowermost winding 35 are connected to the strip-shaped conductive foil 31 exposed through the window 34.

The high-pressure bobbin is constructed in the same manner as the conventional example shown in FIG. 16, and is mounted so as to cover the low-pressure bobbin 30, so a description thereof will be omitted.

Hereinafter, the process of winding the low voltage winding will be explained step by step.

First, as shown in FIG. 3, an insulating film 33 is wound around the low-pressure bobbin 30. At this time, the predetermined strip-shaped conductive foil 31 is wound without shifting so that it is exposed from the predetermined window 34 (.
The figure shows the insulating film 1133 in a rolled up state.

A tertiary winding &'i 5 for generating various voltages to be supplied to various parts of the device is wound on the first layer of the low voltage winding. Fifth
6 and 7 show how the tertiary winding is wound. First, in FIG. 5, the end of the wire 36 is connected to one of the strip-shaped conductive foils 31, that is, the strip-shaped conductive foil 31a.

Then, it is wound a predetermined number of times, resulting in the state shown in FIG. In FIG. 6, the portion between point A and point B is one of a plurality of low voltage windings. However, the wire 36 and the strip-shaped conductive foil 31b are not connected in this state;
To temporarily secure the wire 36, some extra winding is made as shown in FIG. Then, in the state shown in FIG. 7, the wire 36 and the strip-shaped conductive foil 31b are connected, for example, by welding. 37 is a connection point between the wire 36 and the strip-shaped conductive foil 31b. After the connection between the wire 36 and the conductive strip M31b is completed, the next winding is formed. FIG. 8 shows a state in which the tertiary winding is completed, and the winding end of the wire 36 at the top is connected to another strip-shaped conductive foil by welding or the like.

Next, an insulating film is again wound over the state shown in FIG. 8, and the primary winding is wound thereon. FIG. 9 shows the completed primary winding. In Figure 9, 1
The winding start end of the secondary winding 39 is connected to the strip-shaped conductive foil 31c, and the winding end end of the primary winding 39 is connected to the strip-shaped conductive foil 31d. FIG. 12 is a sectional view of the completed state.

By the way, in some cases when the specifications are changed, the primary volume n
4 may not fit into one layer. In such a case, wind it as shown in FIG. That is, after winding one layer, the insulating film 33 is further wound, the wire is folded back at point C, and a new insulating film 3 is wound.
Continue winding on top of 3. FIG. 13 is a sectional view of the completed state in this case.

In the previous embodiment described above, the strip-shaped conductive foil and the terminal pin were separate bodies, and the two were electrically connected on the low-voltage bobbin 30, but with further improvement, the strip-shaped conductive foil and the terminal pin were separated. It is possible to configure them in one piece. That is, the first
In Figure 1, a slit 4 is provided at the tip of the terminal bin holding portion 40.
form 1.

On the other hand, the terminal pin 42 and the strip-shaped conductive foil 43 are integrated by flattening a part of the rod-shaped object and bending it into a predetermined shape with the height of the key. Then, the terminal pin 42 is fixed by being sandwiched between the cracks 41.

Effects of the Invention As described above, the present invention provides a method in which a plurality of strip-shaped conductive foils each having an end connected to a terminal pin are mounted on the low-voltage bobbin in the longitudinal direction of the low-voltage bobbin, and a portion of the conductive foil is exposed. An insulating film with a window is wound around the low-voltage bobbin, and a low-voltage winding is wound on the insulating film, and its end is connected to the strip-shaped conductive foil exposed by the window. The conductive foil provided conduction between the end of each winding in the low voltage winding and the terminal pin, and the end of the winding far from the terminal pin is passed over the other low voltage winding. This eliminates the need to pull it all the way to the terminal pin. Therefore, it is possible to narrow the space between the low-voltage bobbin and the high-voltage bobbin without compromising insulation, and an insulating film is also provided between the strip-shaped conductive foil that serves as the lead wire of the low-voltage winding and other low-voltage windings. Since they are interposed to ensure insulation, the distance between them can be made extremely narrow. Therefore, it is possible to design a very compact design while ensuring insulation properties at various locations.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a low-pressure bobbin of a transformer device for high-pressure generation according to an embodiment of the present invention, FIG. 2 is an enlarged perspective view showing the terminal pin holding portion and terminal pin of the low-pressure bobbin, and FIG. 3 is a perspective view of the low-pressure bobbin. Figure 4 is a perspective view of the low-pressure bobbin with the insulation film wrapped around it, and Figures 5, 6, and 7 are perspective views of the low-pressure bobbin in the middle of being wound. Figure 8 is a perspective view of the low-voltage bobbin with only the tertiary winding wound, Figure 9 is a perspective view of the low-voltage bobbin with the primary winding wound, and Figure 10 is the low-voltage bobbin. FIG. 11 is a perspective view of the primary winding of the bobbin wound in two layers; FIG. 11 is a perspective view of a main part showing an embodiment in which a strip of conductive foil and a terminal pin are integrated; FIG. 12 is a perspective view of the main part of the bobbin; FIG. 13 is a cross-sectional view of a high-voltage generating transformer device in an embodiment in which the primary winding has only one layer, and FIG. 14 is a circuit diagram of an example of a conventional high pressure generation transformer device, FIG. 15 is a sectional view of the same high pressure generation transformer device, and FIG. 16 is a perspective view of the low voltage bobbin 30 of the same high pressure generation transformer device. It is a diagram. 30...Low pressure bobbin 31...Strip-shaped conductive foil 32...
・Terminal pin 33...Insulating film 34...Name of window agent Patent attorney Shigetaka Awano and 1 other person -1ε Figure 1 Reference Figure 2 Figure 3 Figure 4 Figure 5 Figure 1a Figure 6 31a No. 7 Figure 1a Figure 8 Figure 9 COL +8 31C Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15

Claims (1)

[Claims] A cylindrical low-voltage bobbin for winding a low-voltage winding, and a cylindrical high-voltage bobbin for winding a high-voltage winding and covering the low-voltage bobbin so that the end of the low-voltage bobbin protrudes. A terminal pin is provided in a portion of the low-voltage bobbin protruding from the high-voltage bobbin, and a plurality of conductors each having an end connected to the terminal pin are mounted on the low-voltage bobbin along the longitudinal direction of the low-voltage bobbin. An insulating film with a window formed thereon is wound around the low-voltage bobbin so that a part of the conductor is exposed, and a low-voltage winding is wound on the insulating film, and the low-voltage winding is wound through the window. A transformer device for high voltage generation, characterized in that an insulating sheet is connected to the exposed conductive foil and wrapped around the outermost circumference of the low voltage winding.